CN112525183A - Optical fiber ring winding method for improving stress and temperature performance of optical fiber gyroscope - Google Patents
Optical fiber ring winding method for improving stress and temperature performance of optical fiber gyroscope Download PDFInfo
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- CN112525183A CN112525183A CN202011528102.2A CN202011528102A CN112525183A CN 112525183 A CN112525183 A CN 112525183A CN 202011528102 A CN202011528102 A CN 202011528102A CN 112525183 A CN112525183 A CN 112525183A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C19/00—Gyroscopes; Turn-sensitive devices using vibrating masses; Turn-sensitive devices without moving masses; Measuring angular rate using gyroscopic effects
- G01C19/58—Turn-sensitive devices without moving masses
- G01C19/64—Gyrometers using the Sagnac effect, i.e. rotation-induced shifts between counter-rotating electromagnetic beams
- G01C19/72—Gyrometers using the Sagnac effect, i.e. rotation-induced shifts between counter-rotating electromagnetic beams with counter-rotating light beams in a passive ring, e.g. fibre laser gyrometers
- G01C19/721—Details
Abstract
The invention discloses a fiber optic ring winding method for improving stress and temperature performance of a fiber optic gyroscope, which comprises the following steps: calculating and cutting the polarization maintaining optical fiber, the single mode optical fiber and the porous hollow optical fiber with required lengths, and winding the polarization maintaining optical fiber, the single mode optical fiber and the porous hollow optical fiber on 6 fiber distribution discs; mounting the magnetic shielding ring and the 6 fiber distribution discs on winding equipment, winding an optical fiber c section and an optical fiber d section, then winding an optical fiber e section and an optical fiber f section, then winding an optical fiber a section and an optical fiber b section until 4N +4 layers of polarization maintaining optical fibers are wound, then winding an optical fiber e section and an optical fiber f section, cutting off redundant optical fiber c section, optical fiber d section, optical fiber e section and optical fiber f section, and finishing the winding of the whole optical fiber ring; and finally, curing the wound optical fiber ring to complete the welding of the U-shaped magnetic shielding ring and the magnetic shielding cover. The stress distribution symmetry and the temperature performance of the optical fiber ring can be improved, the inhibition effect of the optical fiber ring on Shupe error is improved, and finally the stress distribution and the temperature performance of the optical fiber gyroscope are improved.
Description
Technical Field
The invention relates to the technical field of optical fiber ring processing, in particular to an optical fiber ring winding method for improving stress and temperature performance of an optical fiber gyroscope.
Background
The optical fiber ring is sensitive to environmental temperature and stress abnormity, and phase error caused by the environmental temperature is in direct proportion to temperature change rate and position-related weight factor on the section of optical fiber; the farther away from the center point of the fiber ring, the larger the weight factor, and the greater the influence of the symmetry and stress magnitude of the stress distribution on the symmetry of the fiber ring. At the present stage, quadrupole, octopole and sixteen pole symmetrical winding methods are generally adopted to inhibit the Shupe effect of the optical fiber ring, and low-stress assembly is realized by designing the bonding of the frameless optical fiber ring and the magnetic shielding ring. The winding methods realize good effect of inhibiting the radial temperature of the optical fiber ring and also avoid the huge stress of the skeleton optical fiber ring. Along with the gradual improvement of the precision of the optical fiber gyroscope, the influence of the temperature on the precision of the optical fiber gyroscope is more obvious, and the bonding stress of the frameless optical fiber ring gradually becomes a main stress source of the optical fiber ring.
Therefore, it is required to develop an optical fiber ring having a good suppression effect on the overall temperature of the optical fiber ring and having a low adhesion stress and a winding method thereof.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to solve the problems in the prior art and provide the optical fiber ring winding method for improving the stress and temperature performance of the optical fiber gyroscope, so that the stress distribution symmetry and temperature performance of the optical fiber ring can be improved, the inhibition effect of the optical fiber ring on Shupe error is improved, and finally the stress distribution and temperature performance of the optical fiber gyroscope are improved.
In order to solve the technical problem, the technical scheme adopted by the invention is as follows: a fiber ring winding method for improving stress and temperature performance of a fiber optic gyroscope is characterized by comprising the following steps: the method comprises the following steps:
1) calculating and cutting a polarization maintaining optical fiber, a single mode optical fiber and a porous hollow optical fiber with required lengths, marking the middle points of the polarization maintaining optical fiber, the single mode optical fiber and the porous hollow optical fiber respectively, marking the polarization maintaining optical fibers on two sides of the middle point of the polarization maintaining optical fiber as an optical fiber a section and an optical fiber b section respectively, marking the single mode optical fibers on two sides of the middle point of the single mode optical fiber as an optical fiber c section and an optical fiber d section respectively, and marking the porous hollow optical fibers on two sides of the middle point of the porous hollow optical fiber as an optical fiber e section and an optical; respectively winding an optical fiber section a, an optical fiber section b, an optical fiber section c, an optical fiber section d, an optical fiber section e and an optical fiber section f on 6 fiber distribution discs from two ends of the polarization maintaining optical fiber, the single mode optical fiber and the porous hollow optical fiber to the middle point direction, wherein tail fibers with certain lengths are respectively reserved at the end parts of the optical fiber section a, the optical fiber section b, the optical fiber section c, the optical fiber section d, the optical fiber section e and the optical fiber section f;
2) filling a heat insulating material into the porous hollow optical fiber, filling the inner hole of the porous hollow optical fiber with the heat insulating material, and then melting two ends of the porous hollow optical fiber to isolate two ends of each inner hole of the porous hollow optical fiber from the outside;
3) mounting a magnetic shielding ring on winding equipment, wherein the magnetic shielding ring comprises an inner ring, an outer ring and an annular bottom plate which connects the inner ring with one side of the outer ring, so that the cross section of the magnetic shielding ring is U-shaped, and fiber accommodating rings are arranged on the inner side surfaces of the inner ring and the outer ring; then, coating glue on each surface of the inner side of the magnetic shielding ring; respectively installing the 6 fiber distribution disks on winding equipment, and enabling the middle point of the single-mode fiber to be positioned at the outer edge of the inner side face of the inner ring and to be in a fiber accommodating groove on the outermost side of the inner side face of the inner ring;
4) firstly, winding an optical fiber c section from the outer edge of the inner ring to the inner edge direction along the fiber containing groove on the inner side surface of the inner ring until the optical fiber c section is contacted with the bottom plate, then winding the optical fiber c section on the bottom plate along the inner ring to the outer ring direction until the optical fiber c section is contacted with the inner side surface of the outer ring, then winding the optical fiber c section from the inner edge of the outer ring to the outer edge direction along the fiber containing groove on the inner side surface of the outer ring until the optical fiber c section is close to the outer edge of the outer ring and is positioned in the fiber containing groove on the outermost side; in the winding process, curing is carried out while winding;
5) coating glue on the surface of the first layer of the optical fiber ring, switching the rotation direction of the magnetic shielding ring, firstly winding an optical fiber d section on the first layer of the optical fiber ring along the first layer of the optical fiber ring at the inner side of the inner ring from the outer edge of the inner ring to the inner edge until the first layer of the optical fiber ring is contacted with the first layer of the optical fiber ring on the bottom plate, then winding an optical fiber d section on the first layer of the optical fiber ring of the bottom plate along the direction of the inner ring to the outer ring until the optical fiber d section is contacted with the first layer of the optical fiber ring at the inner side of the outer ring, then winding an optical fiber d section along the first layer of the optical fiber ring at the inner side of the outer ring from the inner edge of; in the winding process, curing is carried out while winding;
6) coating glue on the surface of the second layer of the optical fiber ring, and enabling the midpoint of the porous hollow optical fiber to be located at the outer edge of the second layer of the optical fiber ring on the inner side of the inner ring; then on the second layer of the optical fiber, firstly winding an e section of the optical fiber along the second layer of the optical fiber ring at the inner side of the inner ring from the outer edge of the inner ring to the inner edge until the e section of the optical fiber is contacted with the second layer of the optical fiber ring on the bottom plate, then winding the e section of the optical fiber on the second layer of the optical fiber ring of the bottom plate along the direction of the inner ring to the outer ring until the e section of the optical fiber is contacted with the second layer of the optical fiber ring at the inner side of the outer ring, and then winding the e section of the optical fiber along the second layer of the optical fiber ring at the inner side of the outer ring from the inner edge of the; in the winding process, curing is carried out while winding;
7) coating glue on the surface of the third layer of the optical fiber ring, switching the rotation direction of the magnetic shielding ring, winding an optical fiber f section on the third layer of the optical fiber ring along the third layer of the optical fiber ring on the inner side of the inner ring from the outer edge of the inner ring to the inner edge until the third layer of the optical fiber ring is contacted with the third layer of the optical fiber ring on the bottom plate, winding the optical fiber f section on the third layer of the optical fiber ring on the bottom plate along the direction of the inner ring to the outer ring until the third layer of the optical fiber ring on the inner side of the outer ring is contacted, winding the optical fiber f section along the third layer of the optical fiber ring on the inner side of the outer ring from the inner edge of the outer ring to the outer edge until the; in the winding process, curing is carried out while winding;
8) dipping the polarization maintaining optical fiber, and then enabling the midpoint of the polarization maintaining optical fiber to be positioned on the fourth layer of the optical fiber ring on the bottom plate and to be attached to the fourth layer of the optical fiber ring on the inner side of the inner ring;
9) winding an optical fiber a section on the fourth layer of the optical fiber ring of the bottom plate along the direction from the inner ring to the outer ring until the optical fiber a section is contacted with the fourth layer of the optical fiber ring at the inner side of the outer ring, and finishing the fifth layer winding of the optical fiber ring; then, switching the rotation direction of the magnetic shielding ring, and winding an optical fiber b section on the fifth layer of the optical fiber ring of the bottom plate along the direction from the inner ring to the outer ring until the fifth layer of the optical fiber ring contacts with the fourth layer of the optical fiber ring at the inner side of the outer ring to complete the winding of the sixth layer of the optical fiber ring;
10) winding an optical fiber b section on the sixth layer of the optical fiber ring of the bottom plate along the direction of the outer ring to the inner ring until the optical fiber b section is contacted with the fourth layer of the optical fiber ring at the inner side of the inner ring, and finishing the winding of the seventh layer of the optical fiber ring; then, switching the rotation direction of the magnetic shielding ring, and winding an optical fiber a section on the seventh layer of the optical fiber ring of the bottom plate along the direction from the outer ring to the inner ring until the optical fiber a section is contacted with the fourth layer of the optical fiber ring at the inner side of the inner ring, so as to finish the winding of the eighth layer of the optical fiber ring;
11) repeating the steps 9) -10) until 4N +4 layers of polarization maintaining optical fiber are wound, wherein N is an integer more than or equal to 1; at the moment, the end parts of the optical fiber a section and the optical fiber b section are positioned near the outer edge of the inner ring, and the end parts of the optical fiber c section, the optical fiber d section, the optical fiber e section and the optical fiber f section are positioned near the outer edge of the outer ring;
12) winding an optical fiber f section on the 4N +4 th layer of the optical fiber ring of the bottom plate along the direction of the outer ring to the inner ring until the optical fiber f section is contacted with the fourth layer of the optical fiber ring on the inner side of the inner ring, and curing while winding to finish the winding of the 4N +5 th layer of the optical fiber ring; then, coating glue on the surface of the 4N +5 th layer of the optical fiber ring, switching the rotation direction of the magnetic shielding ring, winding an optical fiber e section on the 4N +5 th layer of the optical fiber ring of the bottom plate along the direction of the outer ring to the inner ring until the optical fiber e section is contacted with the fourth layer of the optical fiber ring at the inner side of the inner ring, and curing while winding to finish the winding of the 4N +6 th layer of the optical fiber ring;
13) cutting off redundant sections c, d, e and f of the optical fiber, and melting two ends of the porous hollow optical fiber again to isolate each hole from the outside, thereby completing the winding of the whole optical fiber ring;
14) and finally, curing the wound optical fiber ring, and welding the U-shaped magnetic shielding ring and the magnetic shielding cover by laser welding.
Furthermore, the turns of optical fibers of two adjacent layers of the optical fiber ring are distributed in a staggered manner.
Furthermore, in the curing process, the curing treatment mode adopts heating curing or ultraviolet curing.
Further, in step 11), a cross-symmetric winding, an octupole symmetric winding or a sixteen-level symmetric winding manner is adopted to wind the polarization maintaining fiber.
Further, in the steps 3) -7), a single-mode optical fiber and a porous hollow optical fiber are wound in a four-pole symmetrical winding mode, an eight-pole symmetrical winding mode or a sixteen-pole symmetrical winding mode.
Compared with the prior art, the invention has the following advantages:
1. the optical fiber ring is directly wound on the magnetic shielding ring, and the periphery of the optical fiber ring with the sensitive angular rate is sequentially coated by the heat-insulating optical fiber ring and the stress-resisting optical fiber ring from inside to outside, so that the bonding stress and the external temperature are isolated outside the optical fiber ring, and the influence of the external temperature and the stress on the optical fiber ring is reduced.
2. The assembly process of the optical fiber ring in the optical fiber gyroscope is simplified, the effect of the external temperature and the stress on the optical fiber ring can be greatly buffered through the fully-surrounded heat insulation optical fiber ring and the stress resistance optical fiber ring, so that the stress distribution symmetry and the temperature performance of the optical fiber ring can be improved, the inhibition effect of the optical fiber ring on Shupe error is improved, and finally the stress distribution and the temperature performance of the optical fiber gyroscope are improved.
Drawings
Fig. 1 is a structural view of an optical fiber loop formed by winding according to the present method.
In the figure: 1-optical fiber a section, 2-optical fiber b section, 3-optical fiber c section, 4-optical fiber d section, 5-optical fiber e section, 6-optical fiber f section, 7-inner ring, 8-outer ring, 9-bottom plate.
Detailed Description
The invention will be further explained with reference to the drawings and the embodiments.
Example (b): referring to fig. 1, a method for winding an optical fiber ring to improve the stress and temperature performance of an optical fiber gyroscope includes the following steps:
1) calculating and cutting the polarization maintaining optical fiber, the single mode optical fiber and the porous hollow optical fiber with required lengths, and then marking the middle points of the polarization maintaining optical fiber, the single mode optical fiber and the porous hollow optical fiber respectively; respectively recording polarization-maintaining optical fibers on two sides of the midpoint of each polarization-maintaining optical fiber as an optical fiber a section 1 and an optical fiber b section 2, respectively recording single-mode optical fibers on two sides of the midpoint of each single-mode optical fiber as an optical fiber c section 3 and an optical fiber d section 4, and respectively recording porous hollow optical fibers on two sides of the midpoint of each porous hollow optical fiber as an optical fiber e section 5 and an optical fiber f section 6; and respectively winding the optical fiber section a 1, the optical fiber section b 2, the optical fiber section c 3, the optical fiber section d 4, the optical fiber section e 5 and the optical fiber section f 6 on 6 fiber distribution discs from two ends of the polarization-maintaining optical fiber, the single-mode optical fiber and the porous hollow optical fiber to the middle point direction, wherein tail fibers with certain lengths are respectively reserved at the end parts of the optical fiber section a 1, the optical fiber section b 2, the optical fiber section c 3, the optical fiber section d 4, the optical fiber section e 5 and the optical fiber section f 6.
2) And (2) pouring a nanoporous porous heat insulation material into the porous hollow optical fiber, so that the inner hole of the porous hollow optical fiber is filled with the heat insulation material, and then melting two ends of the porous hollow optical fiber to isolate two ends of each inner hole of the porous hollow optical fiber from the outside.
3) Mounting a magnetic shielding ring on winding equipment, wherein the magnetic shielding ring comprises an inner ring 7, an outer ring 8 and an annular bottom plate 9 which connects one side of the inner ring 7 with one side of the outer ring 8, so that the cross section of the magnetic shielding ring is U-shaped, and fiber accommodating rings are arranged on the inner side surfaces of the inner ring 7 and the outer ring 8; and then coating glue on each surface of the inner side of the magnetic shielding ring. Respectively installing the 6 fiber distribution disks on winding equipment, and enabling the midpoint of the single-mode fiber to be located at the outer edge of the inner side face of the inner ring 7 and in a fiber accommodating groove on the outermost side of the inner side face of the inner ring 7; wherein, the inner side of the inner ring 7 and the inner side of the outer ring 8 are both sides located at the inner side of the magnetic shielding ring.
4) Firstly, winding an optical fiber c section 3 from the outer edge of the inner ring 7 to the inner edge direction along a fiber accommodating groove on the inner side surface of the inner ring 7 until the optical fiber c section is contacted with the bottom plate 9; then winding the section 3 of the optical fiber c on the bottom plate 9 along the direction from the inner ring 7 to the outer ring 8 until the optical fiber c contacts with the inner side surface of the outer ring 8; and winding the section c 3 of the optical fiber from the inner edge of the outer ring 8 to the outer edge along the fiber containing groove on the inner side surface of the outer ring 8 until the section c 3 of the optical fiber is close to the outer edge of the outer ring 8 and is positioned in the fiber containing groove on the outermost side of the inner side surface of the outer ring 8, and finishing the winding of the first layer of the optical fiber ring. In the winding process, curing is carried out while winding; in the curing process, the synchronization with the winding process needs to be ensured, and the glue in the non-winding area can not be cured.
5) Coating glue on the surface of the first layer of the optical fiber ring, and then switching the rotation direction of the magnetic shielding ring; on the first layer of the optical fiber ring, firstly winding an optical fiber d section 4 from the outer edge of the inner ring 7 to the inner edge direction along the first layer of the optical fiber ring at the inner side of the inner ring 7 until the optical fiber d section is contacted with the first layer of the optical fiber ring on the bottom plate 9, then winding the optical fiber d section 4 on the first layer of the optical fiber ring of the bottom plate 9 along the direction from the inner edge of the outer ring 8 to the outer edge direction along the first layer of the optical fiber ring at the inner side of the outer ring 8 until the optical fiber d section 4 is close to the outer edge of the outer ring 8, and finishing winding the second layer of the optical fiber ring. In the winding process, curing is carried out while winding; in the curing process, the synchronization with the winding process needs to be ensured, and the glue in the non-winding area can not be cured.
6) Coating glue on the surface of the second layer of the optical fiber ring, and enabling the midpoint of the porous hollow optical fiber to be located at the outer edge of the second layer of the optical fiber ring on the inner side of the inner ring 7; and then, on the second layer of the optical fiber, firstly winding an optical fiber e section 5 from the outer edge of the inner ring 7 to the inner edge direction along the second layer of the optical fiber ring at the inner side of the inner ring 7 until the optical fiber e section is contacted with the second layer of the optical fiber ring on the bottom plate 9, then winding the optical fiber e section 5 on the second layer of the optical fiber ring of the bottom plate 9 along the direction from the inner edge of the outer ring 8 to the outer edge direction along the second layer of the optical fiber ring at the inner side of the outer ring 8 until the optical fiber e section 5 is contacted with the second layer of the optical fiber ring at the inner side of the outer ring 8, and winding the optical fiber e section 5 on the outer edge of the outer ring 8 until the optical fiber e. In the winding process, curing is carried out while winding; in the curing process, the synchronization with the winding process needs to be ensured, and the glue in the non-winding area can not be cured.
7) Coating glue on the surface of the third layer of the optical fiber ring, switching the rotation direction of the magnetic shielding ring, winding an optical fiber f section 6 on the third layer of the optical fiber ring along the third layer of the optical fiber ring at the inner side of the inner ring 7 from the outer edge of the inner ring 7 to the inner edge direction until the third layer of the optical fiber ring is contacted with the bottom plate 9, winding the optical fiber f section 6 on the third layer of the optical fiber ring of the bottom plate 9 along the direction from the inner edge of the outer ring 8 to the outer edge direction along the third layer of the optical fiber ring at the inner side of the outer ring 8 until the optical fiber f section 6 is close to the outer edge of the outer ring 8, and finishing the winding of the fourth layer of the optical fiber ring. In the winding process, curing is carried out while winding; in the curing process, the synchronization with the winding process needs to be ensured, and the glue in the non-winding area can not be cured.
8) And (3) performing gum dipping treatment on the polarization maintaining optical fiber, and then enabling the midpoint of the polarization maintaining optical fiber to be positioned on the fourth layer of the optical fiber ring on the bottom plate 9 and to be attached to the fourth layer of the optical fiber ring on the inner side of the inner ring 7.
9) And winding the optical fiber a section 1 on the fourth layer of the optical fiber ring of the bottom plate 9 along the direction from the inner ring 7 to the outer ring 8 until the optical fiber a section contacts with the fourth layer of the optical fiber ring on the inner side of the outer ring 8, thereby completing the fifth layer winding of the optical fiber ring. And then, switching the rotation direction of the magnetic shielding ring, and winding the optical fiber b section 2 on the fifth layer of the optical fiber ring of the bottom plate 9 along the direction from the inner ring 7 to the outer ring 8 until the optical fiber b section contacts with the fourth layer of the optical fiber ring on the inner side of the outer ring 8, thereby completing the winding of the sixth layer of the optical fiber ring.
10) And winding the optical fiber b section 2 on the sixth layer of the optical fiber ring of the bottom plate 9 along the direction from the outer ring 8 to the inner ring 7 until the optical fiber b section is contacted with the fourth layer of the optical fiber ring at the inner side of the inner ring 7, thereby completing the winding of the seventh layer of the optical fiber ring. Then, the rotation direction of the magnetic shielding ring is switched, and the optical fiber a section 1 is wound on the seventh layer of the optical fiber ring of the bottom plate 9 along the direction from the outer ring 8 to the inner ring 7 until the optical fiber a section contacts with the fourth layer of the optical fiber ring on the inner side of the inner ring 7, so that the winding of the eighth layer of the optical fiber ring is completed.
11) Repeating the steps 9) -10) until 4N +4 layers of polarization maintaining optical fiber are wound, wherein N is an integer more than or equal to 1; at this time, the ends of the optical fiber a-segment 1 and the optical fiber b-segment 2 are located near the outer edge of the inner ring 7, and the ends of the optical fiber c-segment 3, the optical fiber d-segment 4, the optical fiber e-segment 5, and the optical fiber f-segment 6 are located near the outer edge of the outer ring 8.
12) And winding the optical fiber f section 6 on the 4N +4 th layer of the optical fiber ring of the bottom plate 9 along the direction from the outer ring 8 to the inner ring 7 until the optical fiber f section contacts with the fourth layer of the optical fiber ring on the inner side of the inner ring 7, and curing while winding to finish the winding of the 4N +5 th layer of the optical fiber ring. And then coating glue on the surface of the 4N +5 th layer of the optical fiber ring, switching the rotation direction of the magnetic shielding ring, winding an optical fiber e section 5 on the 4N +5 th layer of the optical fiber ring of the bottom plate 9 along the direction from the outer ring 8 to the inner ring 7 until the optical fiber e section is contacted with the fourth layer of the optical fiber ring at the inner side of the inner ring 7, and curing while winding to finish the winding of the 4N +6 th layer of the optical fiber ring. In the curing process, the synchronization with the winding process needs to be ensured, and the glue in the non-winding area can not be cured.
13) And cutting off redundant sections 3, d and e of the optical fibers, 5 and f of the optical fibers, melting the two ends of the porous hollow optical fiber again, and isolating each hole from the outside to finish the winding of the whole optical fiber ring.
14) And finally, curing the wound optical fiber ring, and welding the U-shaped magnetic shielding ring and the magnetic shielding cover by laser welding.
In the winding process, the turns of optical fibers of two adjacent layers of the optical fiber ring are distributed in a staggered manner. In the curing process, according to different glues, the curing treatment mode adopts heating curing or ultraviolet curing, so that the curing is faster and the curing effect is better.
In the implementation process, when the polarization-maintaining optical fiber is wound, the polarization-maintaining optical fiber can be wound by adopting a cross symmetrical winding mode, an eight-pole symmetrical winding mode or a sixteen-level symmetrical winding mode. When the single mode fiber and the porous hollow fiber are wound, the single mode fiber and the porous hollow fiber can be wound in a four-pole symmetrical winding mode, an eight-pole symmetrical winding mode or a sixteen-pole symmetrical winding mode.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting the technical solutions, and those skilled in the art should understand that modifications or equivalent substitutions can be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions, and all that should be covered by the claims of the present invention.
Claims (5)
1. A fiber ring winding method for improving stress and temperature performance of a fiber optic gyroscope is characterized by comprising the following steps: the method comprises the following steps:
1) calculating and cutting a polarization maintaining optical fiber, a single mode optical fiber and a porous hollow optical fiber with required lengths, marking the middle points of the polarization maintaining optical fiber, the single mode optical fiber and the porous hollow optical fiber respectively, marking the polarization maintaining optical fibers on two sides of the middle point of the polarization maintaining optical fiber as an optical fiber a section and an optical fiber b section respectively, marking the single mode optical fibers on two sides of the middle point of the single mode optical fiber as an optical fiber c section and an optical fiber d section respectively, and marking the porous hollow optical fibers on two sides of the middle point of the porous hollow optical fiber as an optical fiber e section and an optical; respectively winding an optical fiber section a, an optical fiber section b, an optical fiber section c, an optical fiber section d, an optical fiber section e and an optical fiber section f on 6 fiber distribution discs from two ends of the polarization maintaining optical fiber, the single mode optical fiber and the porous hollow optical fiber to the middle point direction, wherein tail fibers with certain lengths are respectively reserved at the end parts of the optical fiber section a, the optical fiber section b, the optical fiber section c, the optical fiber section d, the optical fiber section e and the optical fiber section f;
2) filling a heat insulating material into the porous hollow optical fiber, filling the inner hole of the porous hollow optical fiber with the heat insulating material, and then melting two ends of the porous hollow optical fiber to isolate two ends of each inner hole of the porous hollow optical fiber from the outside;
3) mounting a magnetic shielding ring on winding equipment, wherein the magnetic shielding ring comprises an inner ring, an outer ring and an annular bottom plate which connects the inner ring with one side of the outer ring, so that the cross section of the magnetic shielding ring is U-shaped, and fiber accommodating rings are arranged on the inner side surfaces of the inner ring and the outer ring; then, coating glue on each surface of the inner side of the magnetic shielding ring; respectively installing the 6 fiber distribution disks on winding equipment, and enabling the middle point of the single-mode fiber to be positioned at the outer edge of the inner side face of the inner ring and to be in a fiber accommodating groove on the outermost side of the inner side face of the inner ring;
4) firstly, winding an optical fiber c section from the outer edge of the inner ring to the inner edge direction along the fiber containing groove on the inner side surface of the inner ring until the optical fiber c section is contacted with the bottom plate, then winding the optical fiber c section on the bottom plate along the inner ring to the outer ring direction until the optical fiber c section is contacted with the inner side surface of the outer ring, then winding the optical fiber c section from the inner edge of the outer ring to the outer edge direction along the fiber containing groove on the inner side surface of the outer ring until the optical fiber c section is close to the outer edge of the outer ring and is positioned in the fiber containing groove on the outermost side; in the winding process, curing is carried out while winding;
5) coating glue on the surface of the first layer of the optical fiber ring, switching the rotation direction of the magnetic shielding ring, firstly winding an optical fiber d section on the first layer of the optical fiber ring along the first layer of the optical fiber ring at the inner side of the inner ring from the outer edge of the inner ring to the inner edge until the first layer of the optical fiber ring is contacted with the first layer of the optical fiber ring on the bottom plate, then winding an optical fiber d section on the first layer of the optical fiber ring of the bottom plate along the direction of the inner ring to the outer ring until the optical fiber d section is contacted with the first layer of the optical fiber ring at the inner side of the outer ring, then winding an optical fiber d section along the first layer of the optical fiber ring at the inner side of the outer ring from the inner edge of; in the winding process, curing is carried out while winding;
6) coating glue on the surface of the second layer of the optical fiber ring, and enabling the midpoint of the porous hollow optical fiber to be located at the outer edge of the second layer of the optical fiber ring on the inner side of the inner ring; then on the second layer of the optical fiber, firstly winding an e section of the optical fiber along the second layer of the optical fiber ring at the inner side of the inner ring from the outer edge of the inner ring to the inner edge until the e section of the optical fiber is contacted with the second layer of the optical fiber ring on the bottom plate, then winding the e section of the optical fiber on the second layer of the optical fiber ring of the bottom plate along the direction of the inner ring to the outer ring until the e section of the optical fiber is contacted with the second layer of the optical fiber ring at the inner side of the outer ring, and then winding the e section of the optical fiber along the second layer of the optical fiber ring at the inner side of the outer ring from the inner edge of the; in the winding process, curing is carried out while winding;
7) coating glue on the surface of the third layer of the optical fiber ring, switching the rotation direction of the magnetic shielding ring, winding an optical fiber f section on the third layer of the optical fiber ring along the third layer of the optical fiber ring on the inner side of the inner ring from the outer edge of the inner ring to the inner edge until the third layer of the optical fiber ring is contacted with the third layer of the optical fiber ring on the bottom plate, winding the optical fiber f section on the third layer of the optical fiber ring on the bottom plate along the direction of the inner ring to the outer ring until the third layer of the optical fiber ring on the inner side of the outer ring is contacted, winding the optical fiber f section along the third layer of the optical fiber ring on the inner side of the outer ring from the inner edge of the outer ring to the outer edge until the; in the winding process, curing is carried out while winding;
8) dipping the polarization maintaining optical fiber, and then enabling the midpoint of the polarization maintaining optical fiber to be positioned on the fourth layer of the optical fiber ring on the bottom plate and to be attached to the fourth layer of the optical fiber ring on the inner side of the inner ring;
9) winding an optical fiber a section on the fourth layer of the optical fiber ring of the bottom plate along the direction from the inner ring to the outer ring until the optical fiber a section is contacted with the fourth layer of the optical fiber ring at the inner side of the outer ring, and finishing the fifth layer winding of the optical fiber ring; then, switching the rotation direction of the magnetic shielding ring, and winding an optical fiber b section on the fifth layer of the optical fiber ring of the bottom plate along the direction from the inner ring to the outer ring until the fifth layer of the optical fiber ring contacts with the fourth layer of the optical fiber ring at the inner side of the outer ring to complete the winding of the sixth layer of the optical fiber ring;
10) winding an optical fiber b section on the sixth layer of the optical fiber ring of the bottom plate along the direction of the outer ring to the inner ring until the optical fiber b section is contacted with the fourth layer of the optical fiber ring at the inner side of the inner ring, and finishing the winding of the seventh layer of the optical fiber ring; then, switching the rotation direction of the magnetic shielding ring, and winding an optical fiber a section on the seventh layer of the optical fiber ring of the bottom plate along the direction from the outer ring to the inner ring until the optical fiber a section is contacted with the fourth layer of the optical fiber ring at the inner side of the inner ring, so as to finish the winding of the eighth layer of the optical fiber ring;
11) repeating the steps 9) -10) until 4N +4 layers of polarization maintaining optical fiber are wound, wherein N is an integer more than or equal to 1; at the moment, the end parts of the optical fiber a section and the optical fiber b section are positioned near the outer edge of the inner ring, and the end parts of the optical fiber c section, the optical fiber d section, the optical fiber e section and the optical fiber f section are positioned near the outer edge of the outer ring;
12) winding an optical fiber f section on the 4N +4 th layer of the optical fiber ring of the bottom plate along the direction of the outer ring to the inner ring until the optical fiber f section is contacted with the fourth layer of the optical fiber ring on the inner side of the inner ring, and curing while winding to finish the winding of the 4N +5 th layer of the optical fiber ring; then, coating glue on the surface of the 4N +5 th layer of the optical fiber ring, switching the rotation direction of the magnetic shielding ring, winding an optical fiber e section on the 4N +5 th layer of the optical fiber ring of the bottom plate along the direction of the outer ring to the inner ring until the optical fiber e section is contacted with the fourth layer of the optical fiber ring at the inner side of the inner ring, and curing while winding to finish the winding of the 4N +6 th layer of the optical fiber ring;
13) cutting off redundant sections c, d, e and f of the optical fiber, and melting two ends of the porous hollow optical fiber again to isolate each hole from the outside, thereby completing the winding of the whole optical fiber ring;
14) and finally, curing the wound optical fiber ring, and welding the U-shaped magnetic shielding ring and the magnetic shielding cover by laser welding.
2. A method for winding a fiber ring for improving the stress and temperature performance of a fiber optic gyroscope according to claim 1, wherein: and the adjacent two layers of the optical fiber rings are distributed in a staggered manner.
3. A method for winding a fiber ring for improving the stress and temperature performance of a fiber optic gyroscope according to claim 1, wherein: in the curing process, the curing treatment mode adopts heating curing or ultraviolet curing.
4. A method for winding a fiber ring for improving the stress and temperature performance of a fiber optic gyroscope according to claim 1, wherein: and 11), winding the polarization maintaining optical fiber in a cross symmetrical winding mode, an octupole symmetrical winding mode or a sixteen-level symmetrical winding mode.
5. A method for winding a fiber ring for improving the stress and temperature performance of a fiber optic gyroscope according to claim 1, wherein: and 3) winding the single-mode optical fiber and the porous hollow optical fiber in a four-pole symmetrical winding mode, an eight-pole symmetrical winding mode or a sixteen-pole symmetrical winding mode.
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| CN112525183B (en) | 2022-07-01 |
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